SPX5205 150mA, LOW-NOISE LDO VOLTAGE REGULATOR JULY 30, 2008 REV. H Fixed Output Voltage FEATURES ■ Low Noise Output LDO: 40μVRMS Possible ■ 1% Initial Accuracy ■ Very Low Quiecent Current: 70μA ■ Low Dropout Voltage (210mV at 150mA) ■ Current and Thermal Limiting ■ Reverse-Battery Protection ■ Wide Range of Fix Output Voltages:1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 5.0V ■ Zero Off-Mode Current ■ Small 5-Pin SOT-23 ■ Pin Compatible to MIC5205/MAX8877 (fixed Options Only) and AS3815 BYP VOUT 5 4 SPX5205 5 Pin SOT-23 1 2 3 VIN GND EN Adjustable Output Voltage ADJ/BYP VOUT 5 4 SPX5205 5 Pin SOT-23 1 2 3 VIN GND EN APPLICATIONS ■ ■ ■ ■ ■ ■ PDA Battery Powered Systems Cellular Phone Cordless Telephones Radio Control Systems Laptop, Palmtop, and Notebook Computers Now Available in Lead Free Packaging ■ ■ ■ ■ Portable Consumer Equipment Portable Instrumentation Bar Code Scanners SMPS Post-Regulator DESCRIPTION The SPX5205 is a positive voltage regulator with very low dropout voltage, output noise and ground current (750μA at 100mA). VOUT has a tolerance of less than 1% and is temperature compensated. Fixed output voltages 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V, and 5.0V and an adjustable version are available in a small 5-pin SOT-23 package. Other key features include zero off-mode current, reverse battery protection, thermal shutdown and current limit. The SPX5205 is an excellent choice for use in batterypowered applications, and where power conservation is desired such as: cellular/ cordless telephones, radio control systems, and portable computers. TYPICAL APPLICATION CIRCUIT VIN 1 VOUT 5 + 1.0μF 2 + SPX5205 GND 3 4 EN BYP (Optn) ENABLE may be tied directly to VIN TOP View Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com SPX5205 150mA, Low-Noise LDO Voltage Regulator REV. H ABSOLUTE MAXIMUM RATINGS Thermal Shutdown .................................................................... Internally Limited Lead Temperature (Soldering, 5 seconds) ................................................. 260°C Operating Junction Temperature Range .................................... -40°C to +125°C Input Supply Voltage ......................................... -20V to +20V Enable Input Voltage ......................................... -20V to +20V RECOMMENDED OPERATING CONDITIONS Input voltage ..................................................................................... +2.5V to 16V Operating Junction Temperature Range .................................... -40°C to +125°C Enable Input Voltage .............................................................................. 0V to VIN SOT-23-5 (eJA) ................................................................................... See Note 1 ELECTRICAL CHARACTERISTICS TJ=25°C, VIN = VOUT + 1V, IL = 100μA, CL = 1μF, and VENABLE * 2.4V. The z denotes the specifications which apply over full temperature range -40°C to +85°C, unless otherwise specified. PARAMETER Output Voltage Tolerance (VOUT) MIN TYP -1 -2 Output Voltage Temperature Coefficient Line Regulation 57 0.03 Load Regulation 0.1 Dropout Voltage (See Note 2) (VIN - VO) 30 140 180 210 Quiescent Current (IGND) 0.05 Ground Pin Current (IGND) 70 350 750 1300 Ripple Rejection (PSRR) Current Limit (ILIMIT) Output Noise (eNO) 70 360 300 MAX UNITS +1 +2 %VNOM 0.1 0.2 %/V 0.2 0.5 1.0 % 50 70 190 230 250 300 275 350 1 5 125 150 600 800 1000 1500 1900 2500 mV 500 Input Voltage Level Logic High (VIL) z z VIN = VOUT +1 to 16V and VEN ≤ 6V VIN = VEN =VOUT +1 ≤ 8V VIN = VEN =VOUT +1 to 16V Ta = 25°C to 85°C VIN = VOUT + 1V ≥ 2.5V IL = 1mA to 150mA IL = 100uA to 1mA IL = 100μA z mV IL = 50mA z mV IL = 100mA z mV IL = 150mA z μA z μA VENABLE ) 0.4V VENABLE ) 0.25V IL = 100μA z IL = 50mA z IL = 100mA z IL = 150mA z dB mA μVRMS μVRMS Input Voltage Level Logic Low (VIL) z z z 0.2 40 ENABLE Input Current ppm/°C %/V CONDITIONS 0.4 V 2 20 μA 2.0 VOUT = 0V IL = 10mA, CL = 1μF, CIN= 1μF (10Hz - 100kHz.) IL = 10mA, CL = 10μF, CBYP = 1μF,CIN=1μF,(10Hz - 100kHz) OFF ON 0.01 3 VIL ) 0.4V VIH * 2.0V Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ (max), the junction to ambient thermal resistance, and the ambient, eJA, and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is given: PD (max) = (TJ (max) - TA)/eJA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The eJA of the SPX5205 is 220°C/W mounted on a PC board. Note 2: Not applicable to output voltages of less than 2V. 2 SPX5205 150mA, Low-Noise LDO Voltage Regulator REV. H TYPICAL PERFORMANCE CHARACTERISTICS 1.40 110 90 IGND (μA) 1.00 IGND (mA) 100 3.3V Device VIN= 3.2V CL = 1.0μF 1.20 0.80 0.60 0.40 80 70 60 VO = 3.3V CL = 1.0μF IL = 100μA 50 0.20 40 30 0.00 0 50 100 150 4 6 8 IL (mA) 12 14 16 VIN (V) Ground Current vs Input Voltage Ground Current vs Load Current 3.340 2.00 3.335 3.3V Device VIN= 4.3V CL = 1.0μF 3.330 3.325 VOUT (V) 1.50 IGND (mA) 10 1.00 3.320 3.315 3.310 3.305 3.3V Device CL= 1.0μF IL = 100μA 3.300 0.50 3.295 3.290 0.00 4 0 50 100 150 6 8 10 VIN (V) IL (mA) Output Voltage vs Input Voltage Ground Current vs Load Current in Dropout 3 12 14 16 SPX5205 150mA, Low-Noise LDO Voltage Regulator REV. H TYPICAL PERFORMANCE CHARACTERISTICS 3.310 VO=3.3V VIN= 3.2V CL = 1.0μF 3.3V Device VIN= 4.3V CL = 1.0μF 3.308 150 VOUT (V) Dropout (mV) 200 100 50 3.306 3.304 3.302 3.300 0 0 50 100 0 150 50 100 IL (mA) IL (mA) Output Voltage vs Load Current Dropout Voltage vs Load Current 90.0 950 VOUT= 3.3V VIN= 4.3V CL= 1.0μF IL = 100μA 850 IGND (μA) IGND (μA) 80.0 70.0 750 650 60.0 550 50.0 -40 150 -20 0 20 40 60 80 450 -40 100 120 VOUT = 3.3V VIN = 4.3V CL= 1.0μF IL = 100mA -20 0 20 40 60 80 100 120 Temperature (°C) Temperature (°C) Ground Current vs Temperature at ILOAD =100mA Ground Current vs Temperature at ILOAD =100μA 4 SPX5205 150mA, Low-Noise LDO Voltage Regulator REV. H TYPICAL PERFORMANCE CHARACTERISTICS 2.30 3.400 2.20 2.00 3.360 3.340 VOUT (V) IGND (mA) 2.10 VOUT= 3.3V VIN= 4.3V CL= 1.0μF 3.380 VOUT= 3.3V VIN= 4.3V CL= 1.0μF IL = 150mA 1.90 1.80 1.70 3.320 3.300 3.280 3.260 1.60 3.240 1.50 3.220 1.40 -40 -20 0 20 40 60 80 3.200 -40 100 120 -20 40 60 80 100 120 Output Voltage vs Temperature Ground Current in Dropout vs Temperature 1.60 350 VOUT =3.3V CL= 1.0μA IL = 100μA Cin = 1uFT, Cout = 1uFT Cin = 1uFT, Cout = 2.2uFT Cin = 1uFT Cout = 10uFT 300 1.40 250 1.30 uV RMS VEN, On Threshold (V) 20 Temperature (°C) Temperature (°C) 1.50 0 1.20 200 150 1.10 100 1.00 50 0.90 0 0.80 4 6 8 10 12 14 16 1 10 100 1000 10000 Bypass Cap (pF) VIN (V) Output Noise vs. Bypass Capacitor Value ENABLE Voltage, ON threshold vs Input Voltage 5 100000 1000000 SPX5205 150mA, Low-Noise LDO Voltage Regulator REV. H APPLICATION INFORMATION The SPX5205 requires an output capacitor for device stability. Its value depends upon the application circuit. In general, linear regulator stability decreases with higher output currents. In applications where the SPX5205 is putting out less current, a lower output capacitance may be sufficient. For example, a regulator sourcing only 10mA, requires approximately half the capacitance as the same regulator sourcing 150mA. portional to the size of the BYP capacitor. Applications requiring a slow ramp-up of the output voltage should use a larger CBYP. However, if a rapid turn-on is necessary, the BYP capacitor can be omitted. Bench testing is the best method for determining the proper type and value of the capacitor since the high frequency characteristics of electrolytic capacitors vary widely, depending on type and manufacturer. A high quality 2.2μF aluminum electrolytic capacitor works in most application circuits, but the same stability often can be obtained with a 1μF tantalum electrolytic. The Typical Application Circuit shown on page 1 represents a SPX5205 standard application circuit. The EN (enable) pin is pulled high (>2.0V) to enable the regulator. To disable the regulator, EN < 0.4V. The SPX5205’s internal reference is available through the BYP pin. The SPX5205 in Figure 1 illustrates a typical adjustable output voltage configuration. Two resistors (R1 and R2) set the output voltage. The output voltage is calculated using the formula: With the SPX5205 adjustable version, the minimum value of output capacitance is a function of the output voltage. The value decreases with higher output voltages, since closed loop gain is increased. VOUT = 1.235V x ( 1 + R1/R2) Typical Applications Circuits R2 must be > 10 k1 and for best results, R2 should be between 22 k1 and 47k1. A capacitor placed between adjustable and ground will provide improved noise performance. A 10nF capacitor on BYP pin will significantly reduce output noise but it may be left unconnected if the output noise is not a major concern. The SPX5205 start-up speed is inversely pro- VIN 1 VOUT 5 R1 2 + SPX5205 GND 3 4 ADJ EN BYP (Optn) Hi-ON Lo-OFF TOP View Figure 1. Typical Adjustable Output Voltage. 6 R2 + SPX5205 REV. H 150mA, Low-Noise LDO Voltage Regulator 7 SPX5205 150mA, Low-Noise LDO Voltage Regulator REV. H ORDERING INFORMATION PART NUMBER TOP MARK ACC. OUTPUT VOLTAGE PACKAGE SPX5205M5-L.............. H1WW ................. 1% ...................... Adj ................... 5 Pin SOT-23 SPX5205M5-L/TR ........ H1WW ................. 1% ...................... Adj ................... 5 Pin SOT-23 SPX5205M5-L-1-2 ......... R12 ................... 1% ..................... 1.2V .................. 5 Pin SOT-23 SPX5205M5-L-1-2/TR .... R12 ................... 1% ..................... 1.2V .................. 5 Pin SOT-23 SPX5205M5-L-1-5 ......... R15 ................... 1% ..................... 1.5V .................. 5 Pin SOT-23 SPX5205M5-L-1-5/TR .... R15 ................... 1% ..................... 1.5V .................. 5 Pin SOT-23 SPX5205M5-L-1-8 ......... R18 ................... 1% ..................... 1.8V .................. 5 Pin SOT-23 SPX5205M5-L-1-8/TR .... R18 ................... 1% ..................... 1.8V .................. 5 Pin SOT-23 SPX5205M5-L-2-0 ......... R20 ................... 1% ..................... 2.0V .................. 5 Pin SOT-23 SPX5205M5-L-2-0/TR .... R20 ................... 1% ..................... 2.0V .................. 5 Pin SOT-23 SPX5205M5-L-2-5 ......... R25 ................... 1% ..................... 2.5V .................. 5 Pin SOT-23 SPX5205M5-L-2-5/TR .... R25 ................... 1% ..................... 2.5V .................. 5 Pin SOT-23 SPX5205M5-L-2-8 ......... R28 ................... 1%......................2.8V................... 5 Pin SOT-23 SPX5205M5-L-2-8/TR .... R28 ................... 1%......................2.8V................... 5 Pin SOT-23 SPX5205M5-L-3-0...........R30.....................1% .....................3.0V................... 5 PIN SOT-23 SPX5205M5-L-3-0/TR.....R30.....................1% .....................3.0V................... 5 PIN SOT-23 SPX5205M5-L-3-3 ......... R33 ................... 1% ..................... 3.3V .................. 5 Pin SOT-23 SPX5205M5-L-3-3/TR .... R33 ................... 1% ..................... 3.3V .................. 5 Pin SOT-23 SPX5205M5-L-5-0 ......... R50 ................... 1% ..................... 5.0V .................. 5 Pin SOT-23 SPX5205M5-L-5-0/TR .... R50 ................... 1% ..................... 5.0V .................. 5 Pin SOT-23 All Packaging is lead free. A bar is added to indicate lead-free parts and can be mistaken as a “1” or an “I”. /TR = Tape and Reel. Pack quantity is 2,500 for 5pin SOT-23 For further assistance: Email: EXAR Technical Documentation: [email protected] http://www.exar.com/TechDoc/default.aspx? Exar Corporation Headquarters and Sales Office 48720 Kato Road Fremont, CA 94538 main: 510-668-7000 fax: 510-668-7030 EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. 8